Crystal fields in the valence-unstable CeNi-based compounds

Clementyev, E. S.; Alekseev, P. A.; Khlopkin, M. N.; Lazukov, V. N.; Sadikov, I. P.; Bührer, W.; Muzychka, A. Yu.

doi:10.1016/s0921-4526(96)01137-4

Cited by 5 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides the opportunity to study the characteristics of the spin gap, the compounds of the REFe2Al10 type, with RE = La, Ce, Nd, give us a chance to observe the influence of the Kondolattice formation on the CEF potential. Such influence has been clearly indicated for intermediate-valence compounds like CeNi [13,14], and CeNi5 [15]. It was also found recently that CEF potential is modified due to the formation of the Kondo-insulator state, as was observed for paramagnetic Tm-ion impurities substituted on the rare-earth sublattice in (Yb,Tm)B12 [11].…”

Section: Introductionmentioning

confidence: 63%

Effect of Nd and Rh substitution on the spin dynamics of the Kondo-insulator CeFe2Al10

et al. 2020

View full text Add to dashboard Cite

The dynamic magnetic properties of the Kondo-insulator state in CeFe2Al10 (spin gap, resonance mode) have been investigated using polarized neutrons on a single crystal of pure CeFe2Al10. The results indicate that the magnetic excitations are polarized mainly along the orthorhombic a axis and their dispersion along the orthorhombic c direction could be determined. Polycrystalline samples of Nd-and Rh-doped CeFe2Al0 were also studied by the time-of-flight technique, with the aim of finding out how the low-energy magnetic excitation spectra change upon isoelectronic substitution of the rare-earth (Nd) on the magnetic Ce site or electron doping (Rh) on the transition-element Fe sublattice. The introduction of magnetic Nd impurities strongly modifies the spin gap in the Ce dynamic magnetic response and causes the appearance of a quasielastic signal. The crystal-field excitations of Nd, studied in both LaFe2Al10 and CeFe2Al10, also reveal a significant influence of f-electron hybridization (largest in the case of Ce) on the crystal-field potential. As a function of the Rh concentration, a gradual change is observed from a Kondo-insulator to a metallic Kondo-lattice response, likely reflecting the decrease in the hybridization energy. 1 The concept of spin-exciton in the narrow gap specific for Kondo insulators was developed by Riseborough [35,36] . This excitation mode develops due to the exchange interaction between RE-ions in Kondo-lattice.

show abstract

Section: Introductionmentioning

confidence: 63%

Effect of Nd and Rh substitution on the spin dynamics of the Kondo-insulator CeFe2Al10

et al. 2020

View full text Add to dashboard Cite

show abstract

“…anomalies in Ce-based mixed-valence [9] compounds initiated by the lattice expansion/contraction due to the Ce 3+ -Ce 4+ valence change [10,11]. A progressive reduction of the cerium magnetic moment is found as the Ni content increases, according to the theoretical model of Kondo lattice [12,13].…”

Section: Introductionmentioning

confidence: 92%